<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <link rel="stylesheet" href="css/demo.css" type="text/css">
    <link rel="stylesheet" href="css/zTreeStyle.css" type="text/css">
<!--    <script type="text/javascript" src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>-->
    <script type="text/javascript" src="js/jquery-1.4.4.min.js"></script>
    <script type="text/javascript" src="js/jquery.ztree.core.js"></script>
    <script type="text/javascript">
        var setting = {
            data: {
                simpleData: {
                    enable: true
                }
            },
            async:{
                enable: true,
                url:"permission"
            }
        };

        $(function(){
            $.fn.zTree.init($("#treeDemo"), setting);
        })
    </script>
</head>
<body>
<ul id="treeDemo" class="ztree"></ul>
</body>
</html>